You have know what number can be multiplied by itself to get 144. You can use a calculator or just multiply numbers till you get it. Don’t divide by two. But the answer is 12 because 12x12=144
If u are trying to solve for x is that x=2
Combining like terms is pretty simple. First, you would identify which terms are similar to what terms. For example, you can't combine two terms that aren't similar like 2x and 3y. It would have to be 2x and 3x to combine. Next, be sure to add/multiply/subtract/divide/etc. the terms. For example, if you had the problem 2x + 4x + 3y, you would combine the "x" terms and the resultant problem would be 6x + 3y. Hope this helped :)
7:6, unless it wants it simplified to decimals